阅读说明：本技术 新能源汽车电机壳加工用大孔径涨芯定位机构 (Large-aperture expansion core positioning mechanism for machining motor shell of new energy automobile ) 是由 许龙 丁祖宏 浦华翔 龚伟杰 于 2019-10-30 设计创作，主要内容包括：本发明涉及新能源汽车电机壳加工用大孔径涨芯定位机构。它含有台板,其特点是：台板上有腔体。腔体内有活塞。腔体下端有下盖,下盖上有进出油口。腔体上部一段外圆为锥形段,锥形段上端有轴向凸边,轴向凸边上有上盖。锥形段外面有内涨套,内涨套内圆为圆锥形并与腔体上部锥形段适配。内涨套外面套有外涨套。外涨套上段外径小于其下段且上下段间呈流线形过渡。上盖上面有压盖,压盖的盖壁罩在外涨套上端的外面。压盖、上盖和活塞间有螺钉,螺钉下端依次穿过压盖、上盖后与活塞上端相连。其中,在外涨状态下,活塞下端与下盖间有间隙。这种定位机构,定位精度高,工作效率高。适用于新能源汽车电机壳体上的两个孔的定位。(The invention relates to a large-aperture expansion core positioning mechanism for machining a motor shell of a new energy automobile. It comprises a bedplate and is characterized in that: the bedplate is provided with a cavity. A piston is arranged in the cavity. The lower end of the cavity is provided with a lower cover which is provided with an oil inlet and an oil outlet. One section excircle in cavity upper portion is the toper section, and there is the axial chimb toper section upper end, has the upper cover on the axial chimb. An internal expansion sleeve is arranged outside the tapered section, and the inner circle of the internal expansion sleeve is conical and is matched with the tapered section at the upper part of the cavity. The outer expansion sleeve is sleeved outside the inner expansion sleeve. The outer diameter of the upper section of the outer expansion sleeve is smaller than that of the lower section of the outer expansion sleeve, and the upper section and the lower section are in streamline transition. The upper cover is provided with a gland, and the cover wall of the gland covers the outer side of the upper end of the outer expansion sleeve. Screws are arranged among the gland, the upper cover and the piston, and the lower ends of the screws sequentially penetrate through the gland and the upper cover and then are connected with the upper end of the piston. Wherein, under the outward expansion state, a gap is arranged between the lower end of the piston and the lower cover. The positioning mechanism has high positioning precision and high working efficiency. The positioning device is suitable for positioning two holes in the motor shell of the new energy automobile.)

1. New energy automobile motor casing processing is with large aperture core positioning mechanism that rises, including the platen, its characterized in that: the bedplate is provided with a cavity; the cavity is cylindrical and is vertically arranged, and a piston is arranged in the cavity; the lower end of the cavity is provided with a lower cover, and the lower cover is provided with an oil inlet and an oil outlet; the lower end of the cavity is fixed on the bedplate; an excircle of one section of the upper part of the cavity is a conical section, the upper end of the conical section is provided with an axial convex edge, and an upper cover is arranged on the axial convex edge and is movably matched with the axial convex edge; an internal expansion sleeve is arranged outside the tapered section, and the inner circle of the internal expansion sleeve is conical and is matched with the tapered section at the upper part of the cavity; the outer diameters of all points of the excircle of the inner expanding sleeve are the same, and the outer expanding sleeve is sleeved outside the inner expanding sleeve; the inner diameter of the outer expansion sleeve is matched with the outer diameter of the inner expansion sleeve, the outer diameter of the upper section of the outer expansion sleeve is smaller than that of the lower section of the outer expansion sleeve, and the upper section and the lower section of the outer expansion sleeve are in streamline transition; the upper surface of the upper cover is provided with a gland, the inner circle of the cover wall of the gland is matched with the outer circle of the upper end of the outer expansion sleeve, and the cover wall of the gland covers the outer side of the upper end of the outer expansion sleeve; the centers of the gland and the upper cover are both provided with shaft holes, the upper end of the piston is provided with a screw hole, and the hole diameters of the shaft holes in the centers of the gland and the upper cover are both larger than the screw hole in the upper end of the piston; the hole diameters of the shaft holes in the centers of the gland and the upper cover are larger than the screw holes of the piston, and screws are arranged among the gland, the upper cover and the piston; the upper end of the screw is provided with a screw cover, the longitudinal middle of the screw below the screw cover is provided with a circumferential step, the length of the screw between the circumferential step and the screw cover is equal to the sum of the thicknesses of the gland and the upper cover, the lower end of the screw sequentially passes through the gland and the shaft hole on the upper cover from the upper part of the gland and then is screwed into the screw hole at the upper end of the piston, and the upper end of the piston is abutted against the axial step on the screw; wherein, under the outward expansion state, a gap is arranged between the lower end of the piston and the lower cover.

2. The large-aperture expansion core positioning mechanism for processing the motor shell of the new energy automobile according to claim 1, characterized in that: the periphery of the piston at the lower end of the cavity is provided with an axial downward bulge, the center of the bedplate corresponding to the axial downward bulge is provided with a through hole, the axial downward bulge extends into the through hole, the diameter of the lower cover is matched with the outer diameter of the axial downward bulge, and the periphery of the lower cover is fixed on the axial downward bulge by means of second screws.

3. The large-aperture expansion core positioning mechanism for processing the motor casing of the new energy automobile according to claim 1 or 2, characterized in that: the diameter of the lower end of the cavity inner cavity is larger than that of the upper section of the cavity inner cavity, so that a first limiting step is formed between the upper section and the lower section of the cavity inner cavity; and a second limit step matched with the first limit step is arranged between the upper section and the lower section of the piston.

Technical Field

The invention relates to a clamp. Specifically, the large-aperture expansion core positioning mechanism is used for positioning two holes in the motor shell of the new energy automobile when the motor shell of the new energy automobile is machined.

Background

As is known in the mechanical industry, a plurality of shaft holes are usually formed around the connecting surface of a shell part such as a motor shell of a new energy automobile. The positioning of such parts depends on the positioning of its two axial bores. At present, the positioning and clamping of the parts are mostly realized by adopting smooth round positioning pins, diamond pins, elastic expansion pin sleeves and push type clamping mechanisms. The sizes of the round positioning pins, the diamond pins, the elastic expansion pin sleeves and the push type clamping mechanisms are generally determined according to the size of an inner hole of a product. The positioning device has the disadvantages that the positioning device adopts the round positioning pins, the diamond pins, the elastic expansion pin sleeves and the push type clamping mechanism for positioning, so that the over-positioning is easy to generate, the requirement on processing precision is higher, the requirement on clamping is strict, the working efficiency is low, and the positioning precision is poor.

Disclosure of Invention

The invention aims to provide a large-aperture expansion core positioning mechanism for machining a motor shell of a new energy automobile. The positioning mechanism has high positioning precision and high working efficiency.

The above problems to be solved by the present invention are realized by the following technical solutions:

the invention relates to a large-aperture expansion core positioning mechanism for processing a motor shell of a new energy automobile, which comprises a bedplate and is characterized in that: the bedplate is provided with a cavity. The cavity is cylindrical and is vertically arranged, and a piston is arranged in the cavity. The lower end of the cavity is provided with a lower cover which is provided with an oil inlet and an oil outlet. The lower end of the cavity is fixed on the bedplate. One section excircle in cavity upper portion is the toper section, and there is the axial chimb toper section upper end, has the upper cover on the axial chimb and be clearance fit between the two. An internal expansion sleeve is arranged outside the tapered section, and the inner circle of the internal expansion sleeve is conical and is matched with the tapered section at the upper part of the cavity. The outer diameters of all points of the excircle of the inner expanding sleeve are the same, and the outer expanding sleeve is sleeved outside the inner expanding sleeve. The inner diameter of the outer expansion sleeve is matched with the outer diameter of the inner expansion sleeve, the outer diameter of the upper section of the outer expansion sleeve is smaller than that of the lower section of the outer expansion sleeve, and the upper section and the lower section of the outer expansion sleeve are in streamline transition. The upper cover is provided with a gland, the inner circle of the cover wall of the gland is matched with the outer circle of the upper end of the outer expansion sleeve, and the cover wall of the gland covers the outer side of the upper end of the outer expansion sleeve. The centers of the gland and the upper cover are both provided with shaft holes, the upper end of the piston is provided with a screw hole, and the hole diameters of the shaft holes at the centers of the gland and the upper cover are both larger than the screw hole at the upper end of the piston. The hole diameters of the shaft holes at the centers of the gland and the upper cover are all larger than the screw holes of the piston, and screws are arranged among the gland, the upper cover and the piston. The upper end of the screw is provided with a screw cover, the longitudinal middle of the screw below the screw cover is provided with a circumferential step, the length of the screw between the circumferential step and the screw cover is equal to the sum of the thicknesses of the gland and the upper cover, the lower end of the screw sequentially passes through the gland and the shaft hole on the upper cover from the upper part of the gland and then is screwed into the screw hole at the upper end of the piston, and the upper end of the piston is abutted against the axial step on the screw. Wherein, under the outward expansion state, a gap is arranged between the lower end of the piston and the lower cover.

The periphery of the piston at the lower end of the cavity is provided with an axial downward bulge, a through hole is formed in the center of the bedplate corresponding to the axial downward bulge, the axial downward bulge extends into the through hole, the diameter of the lower cover is matched with the outer diameter of the axial downward bulge, and the periphery of the lower cover is fixed on the axial downward bulge by means of second screws.

The diameter of the lower end of the cavity inner cavity is larger than that of the upper section of the cavity inner cavity, so that a first limiting step is formed between the upper section and the lower section of the cavity inner cavity; and a second limit step matched with the first limit step is arranged between the upper section and the lower section of the piston.

Drawings

FIG. 1 is a schematic view of a large-aperture expansion core positioning mechanism for processing a motor shell of a new energy automobile.

Detailed Description

As shown in figure 1, the large-aperture expansion core positioning mechanism for processing the motor shell of the new energy automobile comprises a bedplate 2, wherein a cavity 9 is arranged on the bedplate 2. The cavity 9 is cylindrical and is vertically arranged, and a piston 8 is arranged in the cavity. The center of the lower end of the cavity 9 is provided with an axial downward bulge 91, the axial downward bulge 91 is provided with a lower cover 1, and the periphery of the lower cover 1 is connected with the periphery of the axial downward bulge 91 by means of a second screw 92. An oil inlet and outlet 10 is processed on the lower cover 1 so as to be communicated with an oil inlet and an oil outlet of a hydraulic system when in work.

A through hole is processed on the bedplate 2, the aperture of the through hole is matched with the axial downward bulge 91, the axial downward bulge 91 at the lower end of the cavity 9 extends into the through hole on the bedplate 2, and the lower end of the cavity 9 at the outer side of the axial downward bulge 91 is fixed on the bedplate 2 by a third screw 93. One section excircle in cavity 9 upper portion is the toper section, and toper section upper end processing has the axial chimb, is provided with upper cover 6 on the axial chimb and is clearance fit between the two. An internal expansion sleeve 3 is arranged outside the tapered section, and the inner circle of the internal expansion sleeve 3 is conical and is matched with the tapered section at the upper part of the cavity 9. The outer diameters of all points of the excircle of the inner expanding sleeve 3 are the same, and the outer expanding sleeve 4 is sleeved outside the inner expanding sleeve. The inner diameter of the outer expansion sleeve 4 is matched with the outer diameter of the inner expansion sleeve 3, the outer diameter of the upper section of the outer expansion sleeve 4 is smaller than that of the lower section of the outer expansion sleeve, and the upper section and the lower section are in streamline transition. The upper cover 6 is provided with a gland 5, the inner circle of the cover wall of the gland 5 is matched with the outer circle of the upper end of the outer expansion sleeve 4, and the cover wall of the gland 5 covers the outer side of the upper end of the outer expansion sleeve 4. Shaft holes are machined in the centers of the pressing cover 5 and the upper cover 6, screw holes are machined in the upper end of the piston 8, and the hole diameters of the shaft holes in the centers of the pressing cover 5 and the upper cover are larger than the screw holes in the upper end of the piston 8. The hole diameters of the shaft holes in the centers of the gland 5 and the upper cover 6 are larger than the screw holes of the piston 8, and screws 7 are arranged among the gland 5, the upper cover 6 and the piston 8. The upper end of the screw 7 is provided with a screw cover 71, a circumferential step is processed in the longitudinal middle of the screw cover 71, the length of the screw 7 between the circumferential step and the screw cover 71 is equal to the sum of the thicknesses of the gland 5 and the upper cover 6, the lower end of the screw 7 sequentially penetrates through shaft holes in the gland 5 and the upper cover 6 from the upper part of the gland 5 and then is screwed into a screw hole in the upper end of the piston 8, and the upper end of the piston 8 is enabled to be abutted against the axial step on the screw 7. Wherein, under the outward expansion state, a gap is left between the lower end of the piston 8 and the lower cover 1.

The center of the bedplate 2 corresponding to the axial downward bulge 91 is provided with a through hole, the axial downward bulge 91 extends into the through hole, the diameter of the lower cover 1 is matched with the outer diameter of the axial downward bulge 91, and the periphery of the lower cover 1 is fixed on the axial downward bulge 91 by means of second screws 92.

The diameter of the lower end of the inner cavity of the cavity 9 is larger than that of the upper section thereof, so that a first limit step 81 is formed between the upper and lower sections of the inner cavity of the cavity 9. And a second limit step matched with the first limit step 81 is processed between the upper section and the lower section of the piston 8.

When the device works, the upper cover 6 and the gland 5 can move upwards under the action of the piston 8 as long as hydraulic oil is filled into the gap through the oil inlet and outlet. At the same time when the upper cover 6 and the gland 5 move upwards, the internal expansion sleeve 3 moves upwards under the action of the elastic force of the internal expansion sleeve. Along with the upward movement of the inner expansion sleeve 3, the outer expansion sleeve 4 can also contract inwards at the same time, so that the novel energy automobile motor shell positioning device enters a shaft hole on a shell connecting surface of a novel energy automobile motor, and the positioning of the shaft hole on the shell connecting surface of the novel energy automobile motor shell is realized. And then, by adopting the method and repeating the steps, the other shaft hole on the connecting surface of the motor shell of the new energy automobile is positioned. Therefore, the fixing and positioning of the motor shell of the new energy automobile are completed.